NAME
strspn —
span a string
SYNOPSIS
#include
<string.h>
size_t
strspn(const
char *s, const char
*charset);
DESCRIPTION
The
strspn()
function spans the initial part of the NUL-terminated string
s as long as the characters from
s occur in string charset.
RETURN VALUES
The strspn() function returns the number
of characters spanned.
EXAMPLES
The following call to strspn() will return
3, since the first three characters of string s are
part of string charset:
char *s = "foobar"; char *charset = "of"; size_t span; span = strspn(s, charset);
SEE ALSO
memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strstr(3), strtok(3), wcsspn(3)
STANDARDS
The strspn() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
HISTORY
The strspn() function first appeared in
AT&T System III UNIX and was
reimplemented for 4.3BSD-Tahoe.